SH 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 70° N. Long. 60° E. 



950 mb. + 



Mean 62.3 62.1 G0.2 63.1 63.4 60.3 61.6 62.3 58.4 58.2 60.9 62.6 



61.3 



Lat. 70° X. Long. 70" E. 

 950 mb. + 



Mean 64.2 64.2 61.5 63.0 62.1 59.8 60.4 61.4 57.7 57.9 61.9 



64.1 



61.5 



Lat. 70° N. Long. S0° E. 

 950 mb. + 



Date Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Year 



1929 



76.2 



14.5 



5 'J 



.">»>. 



65.3 



tU. 



60.3 



58.4 



59.7 



65.2 



59.1 54.9 57.3 63.1 57.8 



60.7 60. S 58.C 62.7 58.9 



61.9 61.1 67.7 68.2 61.6 58.0 



65.2 65.7 66.6 59.9 55.2 61.4 



67.3 59.5 58.7 61.2 61.9 63.2 



69.7 59.4 58.7 57.3 55.9 56.3 



68.5 59.6 60.4 59.8 63.6 52.4 

 63.3 60.7 61.3 69.7 62.2 57.2 



59.6 59.9 



63.0 60.8 58.8 58.3 60.6 58.9 



58.0 C.l.l 



rs.s 



63.1 



